Smart protective coatings with self‐sensing and active corrosion protection dual functionality from pH-sensitive calcium carbonate microcontainers

Review (2022)

Authors

Tong Liu University of Science and Technology Beijing
Dawei Zhang University of Science and Technology Beijing
Lingwei Ma University of Science and Technology Beijing
Yao Huang University of Science and Technology Beijing
Xiangping Hao University of Science and Technology Beijing
H.A. Terryn Vrije Universiteit Brussel
J.M.C. Mol Team Arjan Mol - Mechanical, Maritime and Materials Engineering
Xiaogang Li University of Science and Technology Beijing
Research Group
Team Arjan Mol (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 Tong Liu, Dawei Zhang, Lingwei Ma, Yao Huang, Xiangping Hao, H.A. Terryn, J.M.C. Mol, Xiaogang Li
DOI: https://doi.org/10.1016/j.corsci.2022.110254
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Published Date

2022

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Arjan Mol

Abstract

Herein, we report the development of a self-sensing and active corrosion protection coating which incorporates pH-sensitive multilayer chitosan/alginate-covered CaCO3 microcontainers containing 1,10-phenanthrolin-5-amine (APhen). The microcontainers can respond to pH variation to release APhen which serves not only as a corrosion indicator but also as an inhibitor. An epoxy coating doped with 5 wt% microcontainers exhibited improved corrosion performance and was capable of inhibiting corrosion spreading from the damaged area in a 3.5 wt% NaCl solution. The salt spray test showed that corrosion damage can be quickly detected by the appearance of a red color within 2 min.

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